Can the cooling water supply to the Texaco water-coal slurry gasifier be restored promptly in case of an interruption?
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Dear sea friends, while discussing accident handling recently, we encountered this issue: Can the cooling water supply to the Texaco water-coal slurry gasifier be restored promptly in the event of a disruption? Let’s discuss!
1. Water supply can be restored once the conditions are met; the process should be carried out slowly. After cooling, it is advisable to enter the furnace to check the water distribution and the downcomers. 2. Additionally, the system should maintain its pressure after the quench water supply is interrupted, until water supply to the quench ring is restored, at which point pressure release can begin!
Thank you. By the way, during the pressure holding period, to what temperatures will the quenching ring and downcomer rise?
After the instrument air is interrupted, is high-pressure nitrogen purging still carried out for the interlock shutdown of the vaporizer? Will the system experience overpressure?
XV20 and XV21 are both FC; they are in accident shutdown mode and cannot be purged
You can only see the increase in tray temperature and process gas outlet temperature
It can be restored after the quench water supply is interrupted; you should have emergency quench water available! When the flow rate of the quench water is low, a interlock is activated based on this flow rate, and the emergency quench water valve opens. As a result, high-pressure ash water is supplied directly to maintain the minimum flow rate, causing the gasification furnace to operate at reduced capacity. The interlock value for this minimum flow rate varies; in our facility, it is 100 cubic meters per hour! ! ! !